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Another World Record!

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Badger:
  Adam, without doing a measured FDC on the bow all I could really do was an estimate. As a general rule a long bow will store energy approx equal to its draw weight. He said the bow shot a 960 grain arrow through the chrono at 210 fps. The arrow had about 94# ft# of kinetic energy which is about 55% of it's draw weight. Just an estimate but likley not too far off.

adb:

--- Quote from: gianluca100 on April 17, 2014, 05:17:14 am ---@ adb: could you tell more about that? I don't know the current viewpoint of the experts.

Thanks in advance,
gian-luca

--- End quote ---

I've disproved that theory myself. I have a linen string (of just slightly more than 1/8" diameter) that I've used on a 120# warbow I made. It withstood multiple shots and the bow and string are fine. The string didn't stretch much, either. That string currently resides full time on a 90# yew self warbow.

PatM:
The British guys on the Leatherwall foam at the mouth if you mention that a natural material string can be made in smaller diameter and hold up to anything over 100 pounds.
 There is also the draw weight issue as if people back then were planning on having a chronic injury free old age  and thus were careful not to over-bow themselves in their youth.

WillS:
Yep!  It seems unlikely that in a time of war when archers were desperately sought after, a whole load of manly soldiers were going "Oooh I dunno boss, I'd love to join your elite force into France and keep my family alive while making some decent money, but I'm currently only on a 95# bow and I've read that it's sensible to progress in 5# increments, so I don't think I could handle your military specific 150# bow I'm afraid.  Maybe next year?"

adb:
I'm sure most have heard this before, but... some of the skeletons recovered from the Mary Rose showed deformation due to shooting heavy draw weight bows over many years. I've been shooting 100# warbows for almost 10 years, and my skeleton has no significant deformation, so it must be caused by something more than that.

I was sceptical too PatM. I always wondered how a natural fiber string could withstand such large forces. I disproved it myself. 120# isn't at the top end, but it's certainly north of the mystical '100# limit.' Also, with no significant reduction in cast, or adverse effects to the string or bow.

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